8020Security Systems Services

This subgroup includes: - Monitoring electronic security alarm systems, such as fire and theft alarms, including their maintenance. - Installation, repair, construction, and setting of mechanical or electronic locking devices, strong rooms, and safes. The sale, installation, and repair of security systems, mechanical or electronic locking devices, strong rooms, and safes, when integral to their operation, are included in this subgroup. Otherwise, they should be classified in the appropriate category. This subgroup does not include: - Installation of security systems, see 4321. - Sale of security systems, mechanical or electronic locking devices, strong rooms, and safes, without monitoring, installation, or maintenance services, see 4759. - Security consulting, see 7490. - Public order and safety activities, see 8423. - Key duplication services, see 9529.